<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
     <script>
          function f1(){

          }
     
          f1.prototype={
                name:'wangxing',
                age:"5",

                src:function(){
                    alert(this.name)
                }
          }
        var p3=new f1();
         console.log(p3 instanceof Object)
         console.log(p3 instanceof f1)
         console.log(p3.constructor instanceof f1)
         console.log(p3.constructor instanceof Object)
     </script>
</body>
</html>